Answer:
1/(x^3)
Step-by-step explanation:
The applicable rule is x^m / x^n = x^(m-n), so here
x^4 / x^7 = x^(4-7) = x^(-3)
next applicable rule, x^(-n) = 1/(x^n) OR (1/x)^n (they are equivalent), so here
x^(-3) = (1/x)^3 OR 1/(x^3), which ever looks better to you and your instructor, likely the second
